突破已经有几个主题，但找不到问题的答案 - 出了什么问题？
我的MenuFragment.java（使用ListView）
public class MenuFragment extends ListFragment {
private ArrayList<Recipe.RecipeType> mUsedRecipeType;
private ArrayList<Recipe> mRecipes;
private ListView mRecipeTypeListView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.menu_fragment, container, false);
mRecipeTypeListView = (ListView) view.findViewById(android.R.id.list);
mRecipeTypeListView.setEmptyView(view.findViewById(android.R.id.empty));
return view;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mRecipes = RecipeLab.get(getActivity()).getRecipes();
mUsedRecipeType = new ArrayList<>();
calculateTypes();
Log.d(MainActivity.TAG, "length arr " + mUsedRecipeType.size());
ArrayAdapter<Recipe.RecipeType> adapter = new ArrayAdapter<Recipe.RecipeType>(getActivity(),
android.R.layout.simple_list_item_1, mUsedRecipeType);
setListAdapter(adapter);
// RecipeTypeAdapter recipeTypeAdapter = new RecipeTypeAdapter(mUsedRecipeType);
// setListAdapter(recipeTypeAdapter);
setRetainInstance(true);
}
// private class RecipeTypeAdapter extends ArrayAdapter<Recipe.RecipeType> {
//
// public RecipeTypeAdapter(ArrayList<Recipe.RecipeType> recipeTypes) {
// super(getActivity(), 0, recipeTypes);
// }
//
// @Override
// public View getView(int position, View convertView, ViewGroup parent) {
// if (convertView == null)
// convertView = getActivity().getLayoutInflater().inflate(R.layout.list_item_recipe_type, parent, false);
//
// Recipe.RecipeType recipeType = getItem(position);
//
// TextView titleTextView = (TextView) convertView.findViewById(R.id.recipe_type_list_item_titleTextView);
// titleTextView.setText(recipeType.toString());
//
// return convertView;
// }
// }
private void calculateTypes() {
for (Recipe recipe: mRecipes) {
if (!mUsedRecipeType.contains(recipe.getRecipeType()))
mUsedRecipeType.add(recipe.getRecipeType());
}
}
}
我的list_item_recipe_type.xml（使用TextView）
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/background_activated_recipe_type"
android:orientation="vertical">
<TextView
android:id="@+id/recipe_type_list_item_titleTextView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="4dp"
android:paddingRight="4dp"
android:textStyle="bold"
android:gravity="center"/>
</LinearLayout>
我有一个错误堆栈
04-10 21:44:15.206 29961-29980/? I/OpenGLRenderer: Initialized EGL, version 1.4
04-10 21:44:15.263 29961-29961/? E/ArrayAdapter: You must supply a resource ID for a TextView
04-10 21:44:15.263 29961-29961/? D/AndroidRuntime: Shutting down VM
04-10 21:44:15.265 29961-29961/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.luxary_team.simpleeat, PID: 29961
java.lang.IllegalStateException: ArrayAdapter requires the resource ID to be a TextView
at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:393)
at android.widget.ArrayAdapter.getView(ArrayAdapter.java:369)
at android.widget.AbsListView.obtainView(AbsListView.java:2346)
at android.widget.ListView.makeAndAddView(ListView.java:1876)
at android.widget.ListView.fillDown(ListView.java:702)
at android.widget.ListView.fillFromTop(ListView.java:763)
at android.widget.ListView.layoutChildren(ListView.java:1671)
at android.widget.AbsListView.onLayout(AbsListView.java:2148)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:1207)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.support.v7.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:435)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
at com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:2678)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2171)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1931)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:670)
at android.view.Choreographer.doFrame(Choreographer.java:606)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.ClassCastException: android.widget.LinearLayout cannot be cast to android.widget.TextView
at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:386)
at android.widget.ArrayAdapter.getView(ArrayAdapter.java:369)
at android.widget.AbsListView.obtainView(AbsListView.java:2346)
at android.widget.ListView.makeAndAddView(ListView.java:1876)
at android.widget.ListView.fillDown(ListView.java:702)
at android.widget.ListView.fillFromTop(ListView.java:763)
at android.widget.ListView.layoutChildren(ListView.java:1671)
at android.widget.AbsListView.onLayout(AbsListView.java:2148)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:1207)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.support.v7.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:435)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
at com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:2678)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2171)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1931)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:670)
at android.view.Choreographer.doFrame(Choreographer.java:606)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
首先，从代码注释中可以看出，我想使用我的ArrayAdapter，但在收到错误后决定使用该标准，然后是标准的标准list_item.xml。但是所有的时间都存在同一个错误。请告诉我，出了什么问题？
答案 0 :(得分：1)
默认情况下，ArrayAdapter会尝试查找带有id="@android:id/text1"的文本视图，并在其中设置数组中的文本值。如果指定自定义布局，则必须确保textview还具有android:id="@android:id/text1"或使用指定textViewResourceId的ArrayAdapter的其他构造函数。所以改为
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/background_activated_recipe_type"
android:orientation="vertical">
<TextView
android:id="@android:id/text1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="4dp"
android:paddingRight="4dp"
android:textStyle="bold"
android:gravity="center"/>
</LinearLayout>
应该工作
答案 1 :(得分：-1)
你需要一个带有textview的自定义布局，可以尝试使用分拣机ID和offcourse android.R.layout.simple_list_item_1做它R.layout。（id_of_textview）